"""""""Then I think pushing the Escape key will clear the filter if any filter is set, that will be a shortcut for removing the filters as an alternative to going back and ctrl+clicking on each one."""

Well I do use esc frequently for canceling selection and commands... Maybe you are thinking of how this will integrate, or a pure change in behaviour. or just an inclusive area? I could see where esc a selection and command, but not intending to deselect my filters would be desired. modified esc is going into complexity area though... Maybe setting up the filters will be quicker than I first think.